Add host_supported to VHAL libs.

We need to build a FakeVehicleHardware impl on host, thus we need
to add the host_supported option.

Test: Local build on host.
Bug: 328316981
Change-Id: Ia21d26640c465846423cab1a0ff8a283c798b92a
diff --git a/automotive/vehicle/aidl/impl/grpc/Android.bp b/automotive/vehicle/aidl/impl/grpc/Android.bp
index e5106f8..fd1d1ca 100644
--- a/automotive/vehicle/aidl/impl/grpc/Android.bp
+++ b/automotive/vehicle/aidl/impl/grpc/Android.bp
@@ -127,4 +127,5 @@
     cflags: [
         "-Wno-unused-parameter",
     ],
+    host_supported: true,
 }
diff --git a/automotive/vehicle/aidl/impl/grpc/utils/proto_message_converter/Android.bp b/automotive/vehicle/aidl/impl/grpc/utils/proto_message_converter/Android.bp
index 52ef7be..d10aa3e 100644
--- a/automotive/vehicle/aidl/impl/grpc/utils/proto_message_converter/Android.bp
+++ b/automotive/vehicle/aidl/impl/grpc/utils/proto_message_converter/Android.bp
@@ -39,6 +39,7 @@
     ],
     defaults: ["VehicleHalDefaults"],
     export_static_lib_headers: ["VehicleHalUtils"],
+    host_supported: true,
 }
 
 cc_test {